Keep scenario authoring visible and restore exact caller context

crates/oa-desktop/src/behavior.rs

@@ -29,12 +29,12 @@ mod scenario_scroll {
     use iced::advanced::{Clipboard, Layout, Shell, Widget, layout, renderer, widget};
     use iced::{Length, Vector, overlay};
 
-    pub(super) fn observe<'a>(
+    pub(super) fn observe<'a, R: renderer::Renderer + 'a>(
         context: scenario::Context,
         area: scenario::ScrollArea,
         restore: Option<scenario::ScrollRestore>,
-        content: impl Into<Element<'a, Message>>,
-    ) -> Element<'a, Message> {
+        content: impl Into<Element<'a, Message, Theme, R>>,
+    ) -> Element<'a, Message, Theme, R> {
         Element::new(Observer {
             content: content.into(),
             context,
@@ -919,20 +919,21 @@ pub fn view(app: &App) -> Element<'_, Message> {
         return out.push(label("Start with a Process, Scenario or State machine using Create element. Add occurrences or regions inside it to describe behavior.")).padding(24).into();
     };
     let e = &p.elements[&selected.id];
-    let compact_process = matches!(e.kind(), Kind::Process | Kind::FunctionalChain);
+    let compact_canvas = matches!(
+        e.kind(),
+        Kind::Process | Kind::FunctionalChain | Kind::Scenario
+    );
     if e.kind() == Kind::StateMachine {
         out = column![text("States & modes").size(20)].spacing(8);
-    } else if compact_process {
-        // The process canvas owns its compact header and remaining-height layout.
+    } else if compact_canvas {
+        // The process/scenario canvas owns its compact remaining-height layout.
         out = column![].spacing(6);
-    } else if matches!(e.kind(), Kind::Process | Kind::FunctionalChain) {
-        out = column![text("Processes & functional chains").size(20)].spacing(8);
     }
     out = out.push(
         pick_list(choices, Some(selected), Message::BehaviorOwner)
             .width(Fill)
             .text_size(13)
-            .padding(if compact_process { 6 } else { 10 }),
+            .padding(if compact_canvas { 6 } else { 10 }),
     );
     if matches!(e.kind(), Kind::Process | Kind::FunctionalChain) {
         return topology::view(app, e.id, out);